The preferred way of setting up your network connection is through the use
of the netconfig program. Run this as root and you will be presented
with a series of questions to answer. The program will then edit the
rc.inet1.conf file.

You will also need kernel support for your network card. The netconfig
program can probe your system for a network card and enable it. Or you can
edit /etc/rc.d/rc.modules and select your card.

Starting with Slackware 7.0, the netconfig program will ask if you
want to use DHCP for your network setup. Or you can edit rc.inet1.conf to run
/sbin/dhcpd for you. Be sure that you have kernel support for your
network card enabled (netconfig can do this for you).